Spring Codes

[88hurstolds]

This spring chart is divided into three columns as follows: 1st column- two digit alpha code 2nd column- service part number 3rd column- three digit alpha code The information in the 1st column can be found on the vehicle option label and will be preceded on the option label by a numeric code which indicates the location on the vehicle 6- left front spring 7- right front spring 8- left rear spring 9- right rear spring The information in the 2nd column has the service part number. The information in the 3rd column can be found on the spring tag.

Front Springs

SERV ID CODE SERV PART NO. CODE PHYS ID XF 14080026 DXF XH 14080026 DXH XJ 14080028 DXJ XK 14080028 DXK XT 14080034 DXT XU 14080034 DXU XX 14080036 DXX XW 14080036 DXW YF 14080044 DYF YH 14080044 DYH YJ 14080046 DYJ YK 14080046 DYK YT 14080052 DYT YU 14080052 DYU YW 14080054 DYW YX 14080054 DYX NK 14080083 DNK NM 14080083 DNM XY 14080087 DXY NT 14080087 DNT NY 14080092 DNY NZ 14080092 DNZ YY 14080096 DYY UN 14080096 DUN NU 14080088 DNU UJ 14080093 DUJ UR 14080098 DUR US 14080098 DUS UT 14080098 DUT NN 14080085 DNN NR 14080085 DNR NS 14080085 DNS XC 14080024 DXC XD 14080024 DXD

Rear Springs

SERVICE CODE SERV PART NO. CODE PHYS ID HP 477512 NHP PZ 477512 PZ ST 485719 ST TU 485719 TU SJ 485727 SJ TJ 485727 TJ SW 485734 SW TS 485736 TS FU 494672 NFU HJ 494672 NHJ HK 10002985 NHK HN 10002985 NHN OB 485721 OB TF 485721 TF TA 485736 TA SW 485734 SW ZZ 485738 ZZ CM 485728 NCM

[88hurstolds]

The front spring rate is 420lbs for the heavy duty F41 spring used in 442/H/O (moog part # 5606).
The normal duty spring has a spring rate of 346lbs (moog part # 5606).
Front springs were trimmed at the factory to achieve right height based on options (aluminum components, non-AC/AC, V6/V8 etc.)
For the back springs the heavy duty F41 is 142lbs (moog part # 5391) and the stock normal duty has a spring rate of around 120lbs (moog part # 5379).

[SmokeGrey]

Thanks for the info.